Wave Diffraction: Albert's Questions

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The discussion centers on how the wavelength of incoming waves influences the diffraction pattern when waves encounter a partial barrier. It is noted that the ratio of the wavelength to the size of the opening is crucial; shorter wavelengths experience minimal diffraction, while longer wavelengths diffract significantly. Additionally, altering the angle of the opening between barriers affects the spread of the diffraction pattern, with larger wavelengths resulting in more pronounced spreading. Understanding these principles helps clarify the behavior of waves in various scenarios. Overall, the relationship between wavelength and barrier size is key to grasping wave diffraction.
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(1) I don't understand how the wavelength of incoming waves affects the wavelength of the outgoing wave when it strikes a partial barrier. For example, in a ripple tank, the waves in the center hit a straight barrier, while those on the sides pass through.
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(2) Same question as 1, but when the angle of the opening between two barriers is altered. Does the wavelength of the incoming waves affect the spread of the diffraction pattern?
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Thank you very much for your help. I just have a hard time understanding waves.

-Albert
 
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Diffraction

The relevant quantity is the ratio of the wavelength to the size of the hole in the barrier. A very short wavelength wave will not "notice" that it is going through anything other an infinitly wide opening, except near the edges. When the wavelength is comparable to, or larger than, the opening, it will diffract strongly.

-Beth
 

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